Salomon Kalou came off the bench to maintain Chelsea's hold on the FA Cup and earn a 1-1 draw at Everton.
The holders and winners for the past two seasons appeared to be heading for a fourth-round exit at Everton after falling behind to a Louis Saha header.
But Kalou, who had entered the field just five minutes earlier, booked a replay at Stamford Bridge as he finished off a swift counter-attack 15 minutes from time.
It came just moments after Petr Cech had produced a brilliant save to prevent Seamus Coleman doubling the Toffees' lead.
Both sides went close to a late winner as Ramires struck a post for Chelsea and Jermaine Beckford also tested Cech.